Heat Sources within the Greenland Ice Sheet: Dissipation, Temperate Paleo-Firn and Cryo-Hydrologic Warming

Ice temperature profiles from the Greenland Ice Sheet contain information on the deformation history, past climates and recent warming. We present full-depth temperature profiles from two drill sites on a flow line passing through Swiss Camp, West Greenland. Numerical modeling reveals that ice tempe...

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Main Authors: Luthi, M. P., Ryser, C., Andrews, L. C., Catania, G. A., Funk, M., Hawley, R. L., Hoffman, M. J., Neumann, T. A.
Format: Article in Journal/Newspaper
Language:English
Published: 2015
Subjects:
ablation zone
west greenland
fast-flow
jakobshavns-isbrae
dark
region
mechanisms
deformation
boreholes
motion
level
geography
physical
geosciences
multidisciplinary
Greenland
Ice Sheet
The Cryosphere
Online Access:http://hdl.handle.net/2152/41107
https://doi.org/10.15781/T2CJ87M9B
https://doi.org/10.5194/tc-9-245-2015
id ftunivtexas:oai:repositories.lib.utexas.edu:2152/41107
record_format openpolar
spelling ftunivtexas:oai:repositories.lib.utexas.edu:2152/41107 2023-05-15T16:24:43+02:00 Heat Sources within the Greenland Ice Sheet: Dissipation, Temperate Paleo-Firn and Cryo-Hydrologic Warming Luthi, M. P. Ryser, C. Andrews, L. C. Catania, G. A. Funk, M. Hawley, R. L. Hoffman, M. J. Neumann, T. A. Andrews, L. C. Catania, G. A. 2015-02 application/pdf http://hdl.handle.net/2152/41107 https://doi.org/10.15781/T2CJ87M9B https://doi.org/10.5194/tc-9-245-2015 English eng Cryosphere doi:10.15781/T2CJ87M9B Lüthi, M. P., C. Ryser, L. C. Andrews, G. A. Catania, M. Funk, R. L. Hawley, M. J. Hoffman, and T. A. Neumann. "Heat sources within the Greenland Ice Sheet: dissipation, temperate paleo-firn and cryo-hydrologic warming." The Cryosphere 9, no. 1 (Feb., 2015): 245-253. 1994-0416 http://hdl.handle.net/2152/41107 doi:10.5194/tc-9-245-2015 Administrative deposit of works to Texas ScholarWorks: This works author(s) is or was a University faculty member, student or staff member; this article is already available through open access or the publisher allows a PDF version of the article to be freely posted online. The library makes the deposit as a matter of fair use (for scholarly, educational, and research purposes), and to preserve the work and further secure public access to the works of the University. Open ablation zone west greenland fast-flow jakobshavns-isbrae dark region mechanisms deformation boreholes motion level geography physical geosciences multidisciplinary Article 2015 ftunivtexas https://doi.org/10.15781/T2CJ87M9B https://doi.org/10.5194/tc-9-245-2015 2020-12-23T22:11:16Z Ice temperature profiles from the Greenland Ice Sheet contain information on the deformation history, past climates and recent warming. We present full-depth temperature profiles from two drill sites on a flow line passing through Swiss Camp, West Greenland. Numerical modeling reveals that ice temperatures are considerably higher than would be expected from heat diffusion and dissipation alone. The possible causes for this extra heat are evaluated using a Lagrangian heat flow model. The model results reveal that the observations can be explained with a combination of different processes: enhanced dissipation (strain heating) in ice-age ice, temperate paleo-firn, and cryo-hydrologic warming in deep crevasses. Swiss National Science Foundation 200021_127197 US-NSF OPP 0908156, OPP 0909454, ANT-0424589 NASA within the US Department of Energy Office of Science Geological Sciences Article in Journal/Newspaper Greenland Ice Sheet The Cryosphere The University of Texas at Austin: Texas ScholarWorks Greenland
institution Open Polar
collection The University of Texas at Austin: Texas ScholarWorks
op_collection_id ftunivtexas
language English
topic ablation zone
west greenland
fast-flow
jakobshavns-isbrae
dark
region
mechanisms
deformation
boreholes
motion
level
geography
physical
geosciences
multidisciplinary
spellingShingle ablation zone
west greenland
fast-flow
jakobshavns-isbrae
dark
region
mechanisms
deformation
boreholes
motion
level
geography
physical
geosciences
multidisciplinary
Luthi, M. P.
Ryser, C.
Andrews, L. C.
Catania, G. A.
Funk, M.
Hawley, R. L.
Hoffman, M. J.
Neumann, T. A.
Heat Sources within the Greenland Ice Sheet: Dissipation, Temperate Paleo-Firn and Cryo-Hydrologic Warming
topic_facet ablation zone
west greenland
fast-flow
jakobshavns-isbrae
dark
region
mechanisms
deformation
boreholes
motion
level
geography
physical
geosciences
multidisciplinary
description Ice temperature profiles from the Greenland Ice Sheet contain information on the deformation history, past climates and recent warming. We present full-depth temperature profiles from two drill sites on a flow line passing through Swiss Camp, West Greenland. Numerical modeling reveals that ice temperatures are considerably higher than would be expected from heat diffusion and dissipation alone. The possible causes for this extra heat are evaluated using a Lagrangian heat flow model. The model results reveal that the observations can be explained with a combination of different processes: enhanced dissipation (strain heating) in ice-age ice, temperate paleo-firn, and cryo-hydrologic warming in deep crevasses. Swiss National Science Foundation 200021_127197 US-NSF OPP 0908156, OPP 0909454, ANT-0424589 NASA within the US Department of Energy Office of Science Geological Sciences
author2 Andrews, L. C.
Catania, G. A.
format Article in Journal/Newspaper
author Luthi, M. P.
Ryser, C.
Andrews, L. C.
Catania, G. A.
Funk, M.
Hawley, R. L.
Hoffman, M. J.
Neumann, T. A.
author_facet Luthi, M. P.
Ryser, C.
Andrews, L. C.
Catania, G. A.
Funk, M.
Hawley, R. L.
Hoffman, M. J.
Neumann, T. A.
author_sort Luthi, M. P.
title Heat Sources within the Greenland Ice Sheet: Dissipation, Temperate Paleo-Firn and Cryo-Hydrologic Warming
title_short Heat Sources within the Greenland Ice Sheet: Dissipation, Temperate Paleo-Firn and Cryo-Hydrologic Warming
title_full Heat Sources within the Greenland Ice Sheet: Dissipation, Temperate Paleo-Firn and Cryo-Hydrologic Warming
title_fullStr Heat Sources within the Greenland Ice Sheet: Dissipation, Temperate Paleo-Firn and Cryo-Hydrologic Warming
title_full_unstemmed Heat Sources within the Greenland Ice Sheet: Dissipation, Temperate Paleo-Firn and Cryo-Hydrologic Warming
title_sort heat sources within the greenland ice sheet: dissipation, temperate paleo-firn and cryo-hydrologic warming
publishDate 2015
url http://hdl.handle.net/2152/41107
https://doi.org/10.15781/T2CJ87M9B
https://doi.org/10.5194/tc-9-245-2015
geographic Greenland
geographic_facet Greenland
genre Greenland
Ice Sheet
The Cryosphere
genre_facet Greenland
Ice Sheet
The Cryosphere
op_relation Cryosphere
doi:10.15781/T2CJ87M9B
Lüthi, M. P., C. Ryser, L. C. Andrews, G. A. Catania, M. Funk, R. L. Hawley, M. J. Hoffman, and T. A. Neumann. "Heat sources within the Greenland Ice Sheet: dissipation, temperate paleo-firn and cryo-hydrologic warming." The Cryosphere 9, no. 1 (Feb., 2015): 245-253.
1994-0416
http://hdl.handle.net/2152/41107
doi:10.5194/tc-9-245-2015
op_rights Administrative deposit of works to Texas ScholarWorks: This works author(s) is or was a University faculty member, student or staff member; this article is already available through open access or the publisher allows a PDF version of the article to be freely posted online. The library makes the deposit as a matter of fair use (for scholarly, educational, and research purposes), and to preserve the work and further secure public access to the works of the University.
Open
op_doi https://doi.org/10.15781/T2CJ87M9B
https://doi.org/10.5194/tc-9-245-2015
_version_ 1766013264636936192

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